A college honors student in the Big Apple for a night of partying was shot dead and dumped from a car on a Brooklyn sidewalk hours after he left an Upper East Side bar with two young women, cops said yesterday.

Mark Fisher, 19, a sophomore at Fairfield University, was found on Argyle Road in Flatbush at 6:30 a.m. Sunday after residents heard gunfire, saw a car drive off and spotted the teen’s body on the ground. Cops are trying to piece together what led to his bizarre hit-style murder.

The well-liked football star had gone to The Bar Harbour on East 77th Street and First Avenue – a popular hangout for students – with pals Chris Peters and Jacqueline Conway. There he met two young women, one a fellow student who had invited him to a party in Flatbush, cops said.

The teen’s friends said Fisher left for the party in a car belonging to one of the two girls, and that his friends returned to Connecticut.

When the 6-foot-4 football MVP and high school prom king failed to return home the next day, his friends called the NYPD’s 70th Precinct in Flatbush to report him missing. Cops there realized their pal’s description matched that of the mysterious body found on Argyle Road.

His parents, Michael and Nancy Fisher, who knew their son had been missing, said officers called them in the early hours yesterday to break the news that their son was dead.

“I haven’t slept. He was a very happy kid who got along with everyone,” said his stunned mom at their upscale family home in Andover, N.J.

The close-knit family, including the slain teen’s older brother and younger sister, was still in shock from the horrifying news.

The parents said they had gone to Brooklyn yesterday to see where their son had been found.

“He had plans to study business overseas, probably in Australia,” his heartbroken father said.

He added that his son had been about to start working for Habitat for Humanity, a charity that builds houses for low-income families.

Cops said Fisher had been shot five times before being dumped from a dark car. He was found lying on a blanket in which he had likely been wrapped in the car, cops said.

Cops found two .22-caliber shells on the ground next to his body, which led them to believe he had also been fired on after he was pushed out of the car.

Cops said when Fisher was found, he had no wallet on him, suggesting he had been robbed.